How precise a measure is, usually shown in the number of decimal places or significant digits

Measurements only rounded to a given significant figure

How many significant figures does 0.0045 have?

How many significant figures does 5610 have?

Rounding 405.3 to the nearest integer is the same as rounding to ________ significant figures.

Significant figure tell us how many numbers after the decimal point

Significant figures are the number of digits in a value, often a measurement, that tells us the degree of accuracy of the value.

Key Stage 3

Rounding to significant figures (Part 1)

2√(17) because that is the answer my calculator gives

8.24 because that is the exact answer to 2 d.p.

A student is thinking of an approximate value for √(67 ). What should her answer be?

Carlos rounded down when he was approximating

Why is the approximation to this calculation greater than the actual answer?